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4 Mesons and Baryons and Pentaquarks (modified Griffiths 4.38, 4.35 in second edition) Quarks carry total spin s = 1/2. Three quarks bind together to make a baryon (such as a proton or neutron), while two quarks (technically a quark and an antiquark, but the distinction is irrelevant here) bind together to make a meson (such as a pion or kaon). Assume the quark states are in the ground state with zero orbital angular momentum. (a) What spins are possible for baryons? (b) What spins are possible for mesons? (c) On July 3, 2015, the LHCb collaboration at CERN announced the discovery of a pentaquark state, consisting of 5 quarks. What spins are possible for a pentaquark? (d) You can produce beams of baryons, mesons, and pentaquarks in your lab, and shoot them at Stern-Gerlach apparati. How many beams might you expect each of the samples to split into as it passes the SGA?

          4 Mesons and Baryons and Pentaquarks (modified Griffiths
4.38, 4.35 in second edition)
Quarks carry total spin s = 1/2. Three quarks bind together to make a baryon (such as
a proton or neutron), while two quarks (technically a quark and an antiquark, but the
distinction is irrelevant here) bind together to make a meson (such as a pion or kaon).
Assume the quark states are in the ground state with zero orbital angular momentum.
(a) What spins are possible for baryons?
(b) What spins are possible for mesons?
(c) On July 3, 2015, the LHCb collaboration at CERN announced the discovery of a
pentaquark state, consisting of 5 quarks. What spins are possible for a pentaquark?
(d) You can produce beams of baryons, mesons, and pentaquarks in your lab, and shoot
them at Stern-Gerlach apparati. How many beams might you expect each of the
samples to split into as it passes the SGA?

4 Mesons and Baryons and Pentaquarks (modified Griffiths
4.38, 4.35 in second edition)
Quarks carry total spin s = 1/2. Three quarks bind together to make a baryon (such as
a proton or neutron), while two quarks (technically a quark and an antiquark, but the
distinction is irrelevant here) bind together to make a meson (such as a pion or kaon).
Assume the quark states are in the ground state with zero orbital angular momentum.
(a) What spins are possible for baryons?
(b) What spins are possible for mesons?
(c) On July 3, 2015, the LHCb collaboration at CERN announced the discovery of a
pentaquark state, consisting of 5 quarks. What spins are possible for a pentaquark?
(d) You can produce beams of baryons, mesons, and pentaquarks in your lab, and shoot
them at Stern-Gerlach apparati. How many beams might you expect each of the
samples to split into as it passes the SGA?

Added by Holly L.

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